Across
- 2. a fire has how many zones
- 6. what is needed to extinguish fire
- 7. it is caused by burning fuels
- 9. produces light,heat and sound
Down
- 1. has no apparent reason for catching fire
- 3. this has the most calorif value
- 4. these are exhaustible natural fuel
- 5. which gas is essential for combustio
- 8. which is the hottest zone in flame